2,2,6,6 tetramethylpiperidine 1 oxyl 1 2,2,6,6-tetramethyl-1-piperidine 1 Article 1 Bromides 1 Cellulose 1 Fourier transform infrared spectroscopy 1 Lithium Compounds 1 Oxidation-Reduction 1 Piperidines 1 TEMPO-homogeneous oxidation 1 bromide 1 carbon nuclear magnetic resonance 1 carboxyl group 1 cellulose 1 chemical reaction 1 chemical structure 1 chemistry 1 dissolution 1 fractionation 1 lithium bromide 1 lithium bromide hydrate lithium bromide hydrates 1 lithium derivative 1 oxidation 1 oxidation reduction reaction 1 pH 1 particle size 1 piperidine derivative 1 unclassified drug 1 water solubility 1